The predict option allows you to choose non default options (ie., objects
other than xb)

Hope this helps.

Partha

Corey Phelps wrote:

I am trying to calculate marginal effects using the "mfx compute" command
for a xtnbreg model. Because mfx computes marginal effects from the
post-estimated linear predictions, the default dydx calculation returns the
regresssion betas as marginal effects. However, I am interested in the
marginal effect (exp^BX)Bj, evaluated at the sample means of the covariates.
How do I go about obtaining this?
Corey Phelps